Time Duration Calculator
Add or subtract time durations, or calculate the time between two times. Perfect for tracking work hours, project time, or any time-based calculations.
Time Duration Calculator
Add or subtract time durations, or calculate time between two times
Duration 1
Duration 2
Time Conversion Reference
| Unit | Seconds | Minutes | Hours |
|---|---|---|---|
| 1 Minute | 60 | 1 | 0.0167 |
| 1 Hour | 3,600 | 60 | 1 |
| 1 Day | 86,400 | 1,440 | 24 |
| 1 Week | 604,800 | 10,080 | 168 |
| 1 Year (365 days) | 31,536,000 | 525,600 | 8,760 |
How to Use
- 1Select mode — Choose to add durations, subtract durations, or calculate time between two times.
- 2Enter first duration — Input the first time duration in days, hours, minutes, and seconds.
- 3Enter second duration — Input the second time duration or end time.
- 4View results — See the calculated result in multiple formats.
Frequently Asked Questions
How do I add time durations?
Select "Add durations" mode, enter the first duration (e.g., 2 hours 30 minutes), then enter the second duration (e.g., 1 hour 45 minutes). The calculator will show the total (4 hours 15 minutes).
Can I calculate work hours?
Yes! Use the "Time between two times" mode to calculate hours worked. Enter your start time (e.g., 9:00 AM) and end time (e.g., 5:30 PM) to get the duration.
What if the result is negative?
When subtracting, if the second duration is larger than the first, the result will be negative. This is shown with a minus sign in the result.
How are the totals calculated?
The calculator converts all time units to seconds, performs the calculation, then converts back. Total hours, minutes, and days are shown as decimal values for precision.